300 iPads 4 won't connect to WiFi
I've got 300 iPads all of them connected to the wifi when they were setup. All working for the past 18 months. Suddenly I have 4 which will not connect. Nothing has changed as the other 296 all still connect and work fine. I have done factory resets, supervised and unsupervised using Apple Configurator but still no luck. The apple support have been useless so far.
The message when you connect simply says 'unable to connect to 'WiFi'
Using the iPhone config utility console I get the attached log. Attachment 22786
Does that make sense to anyone? Or has anyone had this before and found a solution?